"We have video evidence, which we will be analyzing, to get a detailed description of who this individual is," Dyer said.

Though he didn't want to speak on camera, Muhammad's father said his son first talked of killing people more than a decade ago.

"I keep telling Kori, stop saying white people. We need to get rid of bad people. Not get rid of them as in kill them," his father said.

Muhammad gave himself up not far from where the last victim was killed in front of Catholic Charities. He told police he gave himself up easily because, as the chief related, he had "respect for police." He didn't want to force them to shoot him and put themselves in a bad light.